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Production method for coated conductor RE-BaCuO (REBCO) superconductive layer

A growth method and technology of coated conductors are applied in the field of preparation of coated conductor REBCO, which can solve the problems of unfavorable YBCO coated conductor industrialized production, strict equipment requirements and high cost, so as to overcome the thickness effect, low cost and high preparation efficiency Effect

Inactive Publication Date: 2016-03-09
NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] Although the thickness effect of the superconducting layer is effectively overcome by replacing part of Y with Gd by the pulsed laser deposition (PLD) method, the experiment needs to be carried out in a vacuum environment by using the pulsed laser deposition method, and the requirements for equipment are relatively strict, and the cost is relatively high. High, not conducive to the industrial production of high-quality YBCO coated conductors

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  • Production method for coated conductor RE-BaCuO (REBCO) superconductive layer
  • Production method for coated conductor RE-BaCuO (REBCO) superconductive layer

Examples

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Embodiment 1

[0025] In this embodiment, a REBCO superconducting layer with a thickness of 1 μm is prepared on an LAO substrate. The conventional metal-organic solution deposition process is carried out by dipping puller equipment. The specific process is as follows:

[0026] (1) Dissolve the four acetates of yttrium acetate, gadolinium acetate or samarium acetate, barium acetate and copper acetate in accordance with the metal cation concentration ratio: Y:Gd:Ba:Cu:O=0.9:0.1:2:3.10 Ionized water obtains a solution A with a cation concentration of 1mol / L;

[0027] (2), add excess propionic acid to solution A, and stir evenly to make it fully react, and obtain solution B by vacuum distillation at 70°C under reduced pressure;

[0028] (3), add methanol in solution B, adjust the metal cation concentration of the solution to 1.5mol / L, and add PVB as a thickener, the mass ratio of the thickener to the solution is 1:20, stir evenly, and obtain the colloidal precursor solution ;

[0029] (4), u...

Embodiment 2

[0033] In this embodiment, a REBCO superconducting layer with a thickness of 2 μm is prepared on an LAO substrate. The conventional metal-organic solution deposition process is carried out by dipping puller equipment. The specific process is as follows:

[0034] The preparation method of the present embodiment is different from embodiment 1 except steps (1), (3), (4), and all the other repeat the steps in embodiment 1, and concrete process is as follows:

[0035] (1) Dissolve the four acetates of yttrium acetate, gadolinium acetate or samarium acetate, barium acetate and copper acetate in accordance with the metal cation concentration ratio: Y:Gd:Ba:Cu:O=0.8:0.2:2:3.10 Ionized water obtains a solution A with a cation concentration of 1mol / L;

[0036] (2), repeat step (2) among the embodiment 1;

[0037] (3), add methanol in solution B, adjust the metal cation concentration of the solution to 1.5mol / L, and add PVB as a thickener, the mass ratio of the thickener to the soluti...

Embodiment 3

[0042] In this embodiment, a REBCO superconducting layer with a thickness of 3 μm is prepared on an LAO substrate. The conventional metal-organic solution deposition process is carried out by dipping puller equipment. The specific process is as follows:

[0043] The preparation method of the present embodiment is different from embodiment 1 except steps (1), (3), (4), and all the other repeat the steps in embodiment 1, and concrete process is as follows:

[0044] (1) Dissolve the four acetates of yttrium acetate, gadolinium acetate or samarium acetate, barium acetate and copper acetate in accordance with the metal cation concentration ratio: Y:Gd:Ba:Cu:O=0.7:0.3:2:3.10 Ionized water obtains a solution A with a cation concentration of 1mol / L;

[0045] (2), repeat step (2) among the embodiment 1;

[0046](3), add methanol in solution B, adjust the metal cation concentration of the solution to 1.5mol / L, and add PVB as a thickener, the mass ratio of the thickener to the solutio...

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Abstract

The invention provides a production method for a coated conductor RE-BaCuO (REBCO) superconductive layer, and particularly relates to a method for preparing the REBCO superconductive layer in a LAO substrate through the mode of partially replacing Y ions with Gd ions or Sm ions. The thickness effect of an yttrium barium copper oxide (YBCO) superconductive layer is effectively overcome, and the superconducting current-carrying capacity is improved. The preparation method takes advantages of an organic metal solution deposition technology. The method comprises the following steps that firstly, a precursor solution is prepared according to a metal positive ion ratio which is represented as the equation that Y:RE:Ba:Cu:O=1-x:x:2:3.10; secondly, dip-coating is conducted on a lanthanum aluminate substrate through a dip coater for many times; and lastly, a coated sample is subjected to heat treatment and annealing treatment, and a YBCO superconductive layer produced on the lanthanum aluminate substrate is obtained. According to the method, the REBCO coated conductor with high current-carrying capacity can be produced, the thickness reaches five microns, and the critical current can reach 500 A / cm.

Description

technical field [0001] The present invention relates to a method for preparing a coating conductor REBCO, in particular to a method for growing a REBCO superconducting layer on a lanthanum aluminate substrate by organic metal solution deposition, and to a REBCO coating produced by the method conductor. Background technique [0002] Currently, the power supply is becoming increasingly tight, yet a large amount of power is wasted on traditional cables. If superconducting strips are used, not only these losses can be completely avoided, but also a large amount of metal materials can be saved. [0003] The research hotspot of superconducting tape today is the second-generation high-temperature superconducting tape based on the YBCO (yttrium barium copper oxide) system, but the coated conductor based on the YBCO system has a thickness effect, that is, when its thickness is greater than a certain value (about 2 μm ), the critical current density and even the critical current dec...

Claims

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Application Information

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IPC IPC(8): C23C18/12H01B12/06
CPCC23C18/1216C23C18/1245C23C18/1254C23C18/1279C23C18/1295H01B12/06Y02E40/60
Inventor 刘胜利何茂赟王海云
Owner NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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